Turn: Why do you Check/Call in first place on the turn? I would definitely rather prefer 2nd barreling there and we might even protect our hand and of course avoid him bluffing vs us.
What you hoping that a loose player just folds directly on the flop vs you?

As playedRiver: Not really a perfect sample to look at the river aggression. But rather you should be looking how the opponent is playing and if he could be overplaying 7x here.
What about W$SD for example? According to that we could base our actions. But being so deep of course folding is going to be safer while haven't invested much into the pot if you think he is mainly doing it with the nuts.